Sub-mm position with Stamp2sx?
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Posts: 46,084
Good afternoon,
I have a chamber, measuring 4m by 2m, and am contemplating whether
it's practical to build an x-y coordinate system to carry a very small
load. This would have to be accurate to sub-mm (0.4mm or so) throughout
the entire region.
The position of the load should be controlled by a stamp2sx, as:
1) It should not take 10min to move the load completely across
the chamber, so encoder data should be gathered pretty fast at this
resolution.
2) The encoder I'd use would probably be at least 1000cpr,
possibly geared down.
For this application, the resolution and absolute accuracy are most
important.
I don't know if a stamp is capable of this, but:
Has anyone built a setup similar to this, using a Stamp as the main
processor?
Thank you for your time, have a pleasant evening,
Paul
I have a chamber, measuring 4m by 2m, and am contemplating whether
it's practical to build an x-y coordinate system to carry a very small
load. This would have to be accurate to sub-mm (0.4mm or so) throughout
the entire region.
The position of the load should be controlled by a stamp2sx, as:
1) It should not take 10min to move the load completely across
the chamber, so encoder data should be gathered pretty fast at this
resolution.
2) The encoder I'd use would probably be at least 1000cpr,
possibly geared down.
For this application, the resolution and absolute accuracy are most
important.
I don't know if a stamp is capable of this, but:
Has anyone built a setup similar to this, using a Stamp as the main
processor?
Thank you for your time, have a pleasant evening,
Paul
Comments
motors. Start with edmund scientific and go from there. I don't have any
URL's handy, but there are several other outfits that make them. Definitely
something a stamp can drive, I would think.
Original Message
From: Paul J. Csonka <csonka@e...>
To: <basicstamps@egroups.com>
Sent: Monday, July 10, 2000 3:08 PM
Subject: [noparse][[/noparse]basicstamps] Sub-mm position with Stamp2sx?
> Good afternoon,
>
> I have a chamber, measuring 4m by 2m, and am contemplating whether
> it's practical to build an x-y coordinate system to carry a very small
> load. This would have to be accurate to sub-mm (0.4mm or so) throughout
> the entire region.
> The position of the load should be controlled by a stamp2sx, as:
>
> 1) It should not take 10min to move the load completely across
> the chamber, so encoder data should be gathered pretty fast at this
> resolution.
>
> 2) The encoder I'd use would probably be at least 1000cpr,
> possibly geared down.
>
>
> For this application, the resolution and absolute accuracy are most
> important.
> I don't know if a stamp is capable of this, but:
>
> Has anyone built a setup similar to this, using a Stamp as the main
> processor?
>
>
> Thank you for your time, have a pleasant evening,
> Paul
>
>
>
>
>
I haven't seen one yet that allows a 4m by 2m range of motion. If
you've found one, could you please tell me where?
If they are stepper driven that is a bonus; as you also mention,
it would make driving the platform with a Stamp much simpler.
Thank you for your time,
Paul
On Tue, 11 Jul 2000, Carl McIver wrote:
> Several companies make submicron positioners that are driven by stepper
> motors. Start with edmund scientific and go from there. I don't have any
> URL's handy, but there are several other outfits that make them. Definitely
> something a stamp can drive, I would think.
>
>
Original Message
> From: Paul J. Csonka <csonka@e...>
> To: <basicstamps@egroups.com>
> Sent: Monday, July 10, 2000 3:08 PM
> Subject: [noparse][[/noparse]basicstamps] Sub-mm position with Stamp2sx?
>
>
> > Good afternoon,
> >
> > I have a chamber, measuring 4m by 2m, and am contemplating whether
> > it's practical to build an x-y coordinate system to carry a very small
> > load. This would have to be accurate to sub-mm (0.4mm or so) throughout
> > the entire region.
> > The position of the load should be controlled by a stamp2sx, as:
> >
> > 1) It should not take 10min to move the load completely across
> > the chamber, so encoder data should be gathered pretty fast at this
> > resolution.
> >
> > 2) The encoder I'd use would probably be at least 1000cpr,
> > possibly geared down.
> >
> >
> > For this application, the resolution and absolute accuracy are most
> > important.
> > I don't know if a stamp is capable of this, but:
> >
> > Has anyone built a setup similar to this, using a Stamp as the main
> > processor?
> >
> >
> > Thank you for your time, have a pleasant evening,
> > Paul
> >
> >
> >
> >
> >
>
>
>
>
>
accuracy you're looking for. The most accurate stages are ball lead screw
driven, but you sacrifice range of motion and speed. The toothed (timing)
belt driven models are larger and faster, but less accurate. They are all
expensive. 8^0. Are you looking for sub mm positioning over a 2 meter x 4
meter ROM? For that I think you'll need microstepping stepper drives and
perhaps a higher frequency pulse source than the BS2X...depending on the
speed you need.
Cheers, Duncan
I saw the 4m by 2m. I suspect that if you do a little research you will be
able to find several outfits that sell leadscrews that you can use to
fabricate one of your own; your application doesn't seem like something off
the shelf. Another thought would be to use a submicrom positioner on top of
the platform that would give you the resolution you desire, as well as the
speed you want. A quick web search for precision lead screws gets me
http://www.kerkmotion.com/ which have screws good to 0.0006", which is in
the range you probably want for repeatability, then tack on a submicron on
the platform for the really precision stuff. Encoders won't probably be
needed for the little one, but you definitely would want one for the screws.
I just noticed that the shaft runout for the aforementioned outfit was 2-3
thou, but they say they can do better if you want it. I'm sure that there's
lots of companies that can do the same.
Original Message
From: Paul J. Csonka <csonka@e...>
To: <basicstamps@egroups.com>
Sent: Tuesday, July 11, 2000 12:35 PM
Subject: Re: [noparse][[/noparse]basicstamps] Sub-mm position with Stamp2sx?
> Hi Carl,
>
> I haven't seen one yet that allows a 4m by 2m range of motion. If
> you've found one, could you please tell me where?
> If they are stepper driven that is a bonus; as you also mention,
> it would make driving the platform with a Stamp much simpler.
>
> Thank you for your time,
> Paul
>
> On Tue, 11 Jul 2000, Carl McIver wrote:
>
> > Several companies make submicron positioners that are driven by
stepper
> > motors. Start with edmund scientific and go from there. I don't have
any
> > URL's handy, but there are several other outfits that make them.
Definitely
> > something a stamp can drive, I would think.
> >
> >
Original Message
> > From: Paul J. Csonka <csonka@e...>
> > To: <basicstamps@egroups.com>
> > Sent: Monday, July 10, 2000 3:08 PM
> > Subject: [noparse][[/noparse]basicstamps] Sub-mm position with Stamp2sx?
> >
> >
> > > Good afternoon,
> > >
> > > I have a chamber, measuring 4m by 2m, and am contemplating whether
> > > it's practical to build an x-y coordinate system to carry a very small
> > > load. This would have to be accurate to sub-mm (0.4mm or so)
throughout
> > > the entire region.
> > > The position of the load should be controlled by a stamp2sx, as:
Thank you for your assistance.
Kerkmotion has a nice website. I will contact them for further
details.
I'd also thought of course positioning, followed by the fine,
but initially discarded it. Perhaps on your suggestion I will go with it
after all, as it's definitely the least costly!
Thanks for your time,
Paul
(This appears to be getting off-topic, so my apologies).
On Wed, 12 Jul 2000, Carl McIver wrote:
> A boo-boo on my part. I was thinking millimeters instead of meters when
> I saw the 4m by 2m. I suspect that if you do a little research you will be
> able to find several outfits that sell leadscrews that you can use to
> fabricate one of your own; your application doesn't seem like something off
> the shelf. Another thought would be to use a submicrom positioner on top of
> the platform that would give you the resolution you desire, as well as the
> speed you want. A quick web search for precision lead screws gets me
> http://www.kerkmotion.com/ which have screws good to 0.0006", which is in
> the range you probably want for repeatability, then tack on a submicron on
> the platform for the really precision stuff. Encoders won't probably be
> needed for the little one, but you definitely would want one for the screws.
> I just noticed that the shaft runout for the aforementioned outfit was 2-3
> thou, but they say they can do better if you want it. I'm sure that there's
> lots of companies that can do the same.
>
>
Original Message
> From: Paul J. Csonka <csonka@e...>
> To: <basicstamps@egroups.com>
> Sent: Tuesday, July 11, 2000 12:35 PM
> Subject: Re: [noparse][[/noparse]basicstamps] Sub-mm position with Stamp2sx?
>
>
> > Hi Carl,
> >
> > I haven't seen one yet that allows a 4m by 2m range of motion. If
> > you've found one, could you please tell me where?
> > If they are stepper driven that is a bonus; as you also mention,
> > it would make driving the platform with a Stamp much simpler.
> >
> > Thank you for your time,
> > Paul
> >
> > On Tue, 11 Jul 2000, Carl McIver wrote:
> >
> > > Several companies make submicron positioners that are driven by
> stepper
> > > motors. Start with edmund scientific and go from there. I don't have
> any
> > > URL's handy, but there are several other outfits that make them.
> Definitely
> > > something a stamp can drive, I would think.
> > >
> > >
Original Message
> > > From: Paul J. Csonka <csonka@e...>
> > > To: <basicstamps@egroups.com>
> > > Sent: Monday, July 10, 2000 3:08 PM
> > > Subject: [noparse][[/noparse]basicstamps] Sub-mm position with Stamp2sx?
> > >
> > >
> > > > Good afternoon,
> > > >
> > > > I have a chamber, measuring 4m by 2m, and am contemplating whether
> > > > it's practical to build an x-y coordinate system to carry a very small
> > > > load. This would have to be accurate to sub-mm (0.4mm or so)
> throughout
> > > > the entire region.
> > > > The position of the load should be controlled by a stamp2sx, as:
>
>
>
>
>
>
Original Message
From: Paul J. Csonka <csonka@e...>
To: <basicstamps@egroups.com>
Sent: Wednesday, July 12, 2000 7:29 PM
Subject: Re: [noparse][[/noparse]basicstamps] Sub-mm position with Stamp2sx?
> Hello Carl,
>
> Thank you for your assistance.
>
>
>
> (This appears to be getting off-topic, so my apologies).
>
Nonsense. As long as the stamp is the common denominator, all topics
are fair. Some time ago it got pretty wild discussing nuclear reaction
control with a stamp, but it was nonetheless stamp-based!